Skirt of a truck vehicle



FIG. 1 is a left, front perspective view of a skirt of a truck vehicleshowing our new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a top plan view thereof.

The ornamental design for a skirt of a truck vehicle, as shown anddescribed.